Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7aeff58db870973…

MALICIOUS

PDF

42.9 KB Created: 2020-08-31 06:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70e00ef35088fe3466f2640afe9e8af7 SHA-1: 2832d606591f7b7f4eb6413e582efd0785f1b60a SHA-256: c7aeff58db8709735df530af0611297ab4aa034d95b69cbe729dd89d8f886434
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, with the primary malicious link being the redirector. The document body itself is heavily obfuscated and appears to contain the malicious URL, suggesting an attempt to lure users to malicious content.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=hist%25C3%25B3ria+%25C5%25A1m%25C3%25BDka%25C4%258Dky+a+rebr%25C3%25ADky+doskov%25C3%25A1
    • https://static.usrfiles.com/ugd/405339_8b6214528ba5498698214734f0d4ce92.pdf
    • https://static.usrfiles.com/ugd/9cb927_4d10459543524339acad177ecf32beb6.pdf
    • https://static.usrfiles.com/ugd/d54300_e38f4b7c8491473b911e16223cfb5917.pdf
    • https://static.usrfiles.com/ugd/4cf28d_e068bd02168b4ec6880a7de77ef21102.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/mezunibetarezuvujokaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/godugexiluleparuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/5826/4229/files/descargar_whatsapp_plus_android_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/public_policy_bidyut_chakrabarty_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4679/files/functions_of_operations_management.pdf
    • https://cdn.shopify.com/s/files/1/0429/5521/0905/files/2_phones_lyrics_clean.pdf
    • https://cdn.shopify.com/s/files/1/0449/2935/1835/files/simcity_4_strategy_guide.pdf
    • https://static.usrfiles.com/ugd/2ac701_15a24f389b114f6b8d95c2021e276bf6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7404dad5f7546aeaea5af6da0a6de0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_dac046756b5645e0902e25a83b11bb75.pdf
    • https://static.usrfiles.com/ugd/b8c837_f813b776b3b2450196a554948a86c5eb.pdf
    • https://static.usrfiles.com/ugd/b88e3d_03f5f21524b349eca24a1b0269a50bb9.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://doi.org/10.4312/9789610602507
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f8.bin
210d7dc904944bb2ddc62595ddfaff0f4e2ca9de88bfb192b47abfc2b136ca5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x63F8 6164 bytes
font_01_sfnt_off0000773c.bin
a660715491ae01360a04b61b1712f1ee88a18da8fe7f6af46269cd7722aee7bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x773C 12224 bytes